1,720,954 research outputs found
Oriented right-angled Artin pro- groups and maximal pro- Galois groups
Full text linkFor a prime number we introduce and study oriented right-angled Artin
pro- groups (oriented pro- RAAGs for short)
associated to a finite oriented graph and a continuous group
homomorphism . We show
that an oriented pro- RAAG is a Bloch-Kato
pro- group if, and only if,
is an oriented pro- group
of elementary type generalizing a recent result of I. Snopche and P. Zalesskii.
Here
denotes the canonical -orientation on . We invest
some effort in order to show that oriented right-angled Artin pro- groups
share many properties with right-angled Artin pro--groups or even
discrete RAAG's, e.g., if is a specially oriented chordal graph, then
is coherent, generalizing a result of C. Droms. Moreover,
in this case has the
Positselski-Bogomolov property generalizing a result of H. Servatius, C. Droms
and B. Servatius for discrete RAAG's. If is a specially oriented
chordal graph and in case that
, then generalizing a well known result of M.
Salvetti.Comment: The differences between the 1st version (Apr'23) and the 2nd are:
correction of a couple of minor misprints, dedication to the memory of
Avinoam Man
Groups of p-absolute Galois type that are not absolute Galois groups
Full text linkLet p be a prime. We study pro-p groups of p-absolute Galois type, as defined
by Lam-Liu-Sharifi-Wake-Wang. We prove that the pro-p completion of the
right-angled Artin group associated to a chordal simplicial graph is of
p-absolute Galois type, and moreover it satisfies a strong version of the
Massey vanishing property. Also, we prove that Demushkin groups are of
p-absolute Galois type, and that the free pro-p product -- and, under certain
conditions, the direct product -- of two pro-p groups of p-absolute Galois type
satisfying the Massey vanishing property is again a pro-p group of p-absolute
Galois type satisfying the Massey vanishing property. Consequently, there is a
plethora of pro-p groups of p-absolute Galois type satisfying the Massey
vanishing property that do not occur as absolute Galois groups.Comment: Final version, as it will appear on JPA
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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